3543987278961 has 24 divisors (see below), whose sum is σ = 5244218539560. Its totient is φ = 2304913747200.

The previous prime is 3543987278903. The next prime is 3543987278987. The reversal of 3543987278961 is 1698727893453.

3543987278961 is a `hidden beast` number, since 3 + 5 + 439 + 87 + 27 + 8 + 96 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 102220238961 + 3441767040000 = 319719^2 + 1855200^2 .

It is not a de Polignac number, because 3543987278961 - 2²⁵ = 3543953724529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3543987278961.

It is not an unprimeable number, because it can be changed into a prime (3543987278761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7239295 + ... + 7713323.

It is an arithmetic number, because the mean of its divisors is an integer number (218509105815).

Almost surely, 2^{3543987278961} is an apocalyptic number.

It is an amenable number.

3543987278961 is a deficient number, since it is larger than the sum of its proper divisors (1700231260599).

3543987278961 is a wasteful number, since it uses less digits than its factorization.

3543987278961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494337 (or 494334 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 72.

The spelling of 3543987278961 in words is "three trillion, five hundred forty-three billion, nine hundred eighty-seven million, two hundred seventy-eight thousand, nine hundred sixty-one".